DIN EN 12464 requires that the illuminance on the main surfaces within closed areas is checked. This can be achieved with this tool. We recommend automatic positioning for empty rooms. If furniture or obstructions conceal the walls, it is better to create the main surfaces manually. Draw the contours of the relevant area as a rectangle or a polygon. DIALux generates suitable calculation objects

automatically. The easiest method is to construct the main room surfaces in a 2D view. Please note that for very small areas no grids are generated if the areas of the perimeters are greater than of the surface itself.